Issue 29, 2015

Humidity sensing properties of SrTiO3 nanospheres with high sensitivity and rapid response

Abstract

SrTiO3 nanospheres were synthesized by a hydrothermal method and characterized by X-ray diffraction and scanning electron microscopy. Then, the material was coated on an Al2O3 ceramic substrate to fabricate humidity sensors using Ag–Pd interdigitated electrodes. The sensor shows high humidity sensitivity and fast response and recovery. The impedance changes by four orders of magnitude over a relative humidity (RH) range from 11% to 95%. At the frequency of 100 Hz, response and recovery times are both 2 s, and the maximum hysteresis is <1% RH. In addition, the complex impedance at different RH was investigated to understand the sensing mechanism. The results indicate potential applications of SrTiO3 for fabricating high-performance humidity sensors.

Graphical abstract: Humidity sensing properties of SrTiO3 nanospheres with high sensitivity and rapid response

Article information

Article type
Paper
Submitted
15 Jan 2015
Accepted
23 Feb 2015
First published
02 Mar 2015

RSC Adv., 2015,5, 22879-22883

Humidity sensing properties of SrTiO3 nanospheres with high sensitivity and rapid response

D. Li, J. Zhang, L. Shen, W. Dong, C. Feng, C. Liu and S. Ruan, RSC Adv., 2015, 5, 22879 DOI: 10.1039/C5RA00451A

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